Netravali Leaping Frog
Species Description: Modak N, Dahanukar N, Gosavi N, Padhye AD 2015 Indirana salelkari, a new species of leaping frog (Anura: Ranixalidae) from Western Ghas of Goa, India. J Threatened Taxa 7: 7493-7509.
The collected tadpoles were in various prometamorphic and metamorphic stages. At tadpole stage 41, the larvae had a semi-condensed individual keratodont formula of 4[A1 - A4]/4[P1 - P2] with an oral apparatus that a horny beak divides into two lateral parts. The first anterior keratodont ridge (A1) is divided, but three following anterior keratodont ridges are lateral to the beak. The first posterior labia has one marginal (kerodont), the second is lateral (keradont), and the last two are continuous ridges (Modak et al. 2015).
Indirana salelkari differs from all other species in its genus based on traits including medium size, a head length that is longer than wide, a distinct canthus rostralis, finger I being longer than or equal to finger II, double outer palmar tubercles, long inner metatarsal tubercle, moderate webbing, crescentic marginal grooves on anterior sides of finger and toe disks, glandular folds on dorsal skin, granular ventral skin, a mottled throat, and dark brown palms and soles. Indirana salelkari differs from Indirana tenuilingua in that its inter-orbital distance is equal to or wider than its inter-narital distance (compared to an interorbital distance of over twice the distance separating the nostrils). Compared to Indirana semipalmata, Indirana salalkari has a broader head and moderately webbed toes, versus half webbed toes with a webbing formula of I2 – 2II2 – 3III2 – 3¼IV3¼ - 2V. Indirana beddomii has a webbing formula of I2 – 2II1 – 2III1 – 3IV3 – 1V. Indirana salelkari differs from Indirana brachytarsus in the former having a longer upper arm and moderate webbing (versus extensive webbing of formula I1 – 2II1 – 2½III1 – 3IV3 – 1V in Indirana brachytarsus). Compared to Indirana gundia, Indirana salelkari has tympanum flush with the lateral side of the head and disks with marginal grooves instead of sub-marginal grooves (Modak et al. 2015).
Indirana leithii and Indirana chiravasi tadpoles have oral apparatus similar to those of Indirana salelkari tadpoles due to their similar food (algal matter) and feeding locations (wet rocks and boulders) (Modak et al. 2015).
In life, Indirana salelkari has a dorsum ranging from pale to dark brown to pink. A dark band between the eyes continues on the upper eyelid. An interrupted W shaped patch on the anterior head is sometimes visible. Brown stripes run along the lower mandible, and are sometimes present on the upper mandible. Another brown stripe runs from the snout to the shoulder through the eye and tympanum. The forelimbs and hind limbs have transverse bands (which are paler in females) that also appear on the fingers and toes but may not appear in darker specimens. The lateral edges of the forelimbs have dense brown or black spots (females have fewer spots than males), which sometimes continue onto the ventral sides of the forelimbs. The palms and feet are dark brown and white on their ventral sides. Some specimens have a mottled brown throat. In preservative, the coloration largely remains the same except for the appearance of dark spots on the lateral abdomen and darkening around the outer palmer tubercle. No pink coloration remains in preservative (Modak et al. 2015).
Some sexual dimorphism was observed between four male and four female specimens. Females have eyelid widths that are just over half the diameter of the eye, while for males, it is ¾. Females have a slightly larger inter-narital width than inter-orbital width, and in males these distances are the same. During the breeding season, males develop femoral glands on the thighs and nuptial pads on the outer side of the first finger. Females have paler transverse bands on the forelimbs and hind limbs than males and have fewer spots on the lateral edges of forelimbs and hind limbs (Modak et al. 2015).
Distribution and Habitat
The Indirana salelkari specimens were found on the Tanshikar Spice Farm at Netravali (Neturlim) in Sanguem Taluk of South Goa, India. The elevation at the site is 78 m. The species is not known to exist anywhere else. Indirana salelkari occupies riparian habitats. A few juveniles were found under leaf litter, and tadpoles were collected from exposed lateritic substrate in the same area (Modak et al. 2015).
Life History, Abundance, Activity, and Special Behaviors
Indirana salelkari tadpoles were found on exposed lateritic substrate indicating their adaptation to terrestrial development (Modak et al. 2015).
The species authority is: Modak N, Dahanukar N, Gosavi N, Padhye AD. Indirana salelkari, a new species of leaping frog (Anura: Ranixalidae) from Western Ghats of Goa, India. Journal of Threatened Taxa 7(9), 7493-7509
Indirana salelkari is a monophyletic group based on genetic analysis using Maximum likelihood analysis using a GTR+G+I nucleotide substitution model from 12S rRNA, 16S rRNA, and rhodopsin sequences. Indirana salelkari's sister taxa is Indirana chiravasi, from which it separated around 10.9 myr ago (Modak et al. 2015).
Indirana salelkari is the twelfth species of Ranixadae, a monogeneric family endemic to India’s Western Ghats (Modak et al. 2015).
The species name “salelkari” was chosen in honor of Prakash Salelkar, a Range Forest Officer in Goa who works to conserve wildlife in Goa and assists in field work there (Modak et al. 2015).
The 2014 IUCN redlist of threatened taxa lists six other Indirana species under threatened categories of "Critically endangered" or "Vulnerable", which encompasses half of the known species in this family (Modak et al. 2015).
Modak N, Dahanukar N, Gosavi N, Padhye AD (2015). ''Indirana salelkari, a new species of leaping frog (Anura: Ranixalidae) from Western Ghats of Goa, India.'' Journal of Threatened Taxa , 7(9), 7493-7509.
Written by Sierra Raby (sraby AT berkeley.edu), UC Berkeley
First submitted 2016-11-03
Edited by Ann T. Chang (2016-11-09)
Species Account Citation: AmphibiaWeb 2016 Indirana salelkari: Netravali Leaping Frog <http://amphibiaweb.org/species/8518> University of California, Berkeley, CA, USA. Accessed Oct 20, 2017.
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Citation: AmphibiaWeb. 2017. <http://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 20 Oct 2017.
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